Article
Engineering, Chemical
Chiharu Tokoro, Tatsuya Kato
Summary: Resin-supported Fe(III) demonstrated high removal efficiency for As(V), with over 90% removed through surface precipitation as poorly crystalline ferric arsenate. pH 3 was found to be the optimal condition for As(V) removal.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Jon Petter Gustafsson, Juan Antelo
Summary: The solubility and bioavailability of arsenic in the environment are largely affected by its adsorption reactions with iron oxides. The adsorption of arsenate and phosphate on ferrihydrite suspensions was studied in batch experiments. A surface complexation model based on the CD-MUSIC concept was developed to describe the interactions. The experimental results showed that arsenate and phosphate displayed similar adsorption patterns in single-ion systems, but arsenate was preferentially adsorbed over phosphate in competitive systems. The developed model successfully described these adsorption patterns and predicted the presence of complexation compounds during adsorption.
ACS EARTH AND SPACE CHEMISTRY
(2022)
Article
Geochemistry & Geophysics
Elise Van Eynde, Tjisse Hiemstra, Rob N. J. Comans
Summary: The interaction between zinc and phosphate in soils plays a significant role in the geochemical cycling and environmental risks. The formation of ternary complexes between zinc, phosphate, and soil particles occurs at high loadings. Understanding the mechanisms of metal adsorption in multi-component systems is crucial for assessing metal fate and transport in the environment.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Geochemistry & Geophysics
Sheik Mohammad Nomaan, Shannon N. Stokes, Joonkyoung Han, Lynn E. Katz
Summary: The diffuse layer model (DLM) is commonly used for predicting cation adsorption onto ferrihydrite, but may have limitations in multi-solute systems. Modifications guided by spectroscopic evidence and updated surface characteristics of ferrihydrite have shown improvements in predicting cation adsorption in both single-solute and bi-solute systems.
Article
Chemistry, Physical
Sharmistha De Dalui, Bidisa Das
Summary: Fe(III) oxides and oxyhydroxides, due to their nanoparticulate nature, play a crucial role in contaminant cycling and mobility in the environment through various sorption mechanisms. Doping of impurity ions, such as aluminum (Al), into Fe(III) oxyhydroxide nanoparticles modifies their adsorption energetics, affecting the binding potential of toxic contaminants like arsenic (As). Our electronic structure studies demonstrate that Al doping reduces the As binding potential of Fe(III) oxyhydroxide clusters for As3+, while it has minimal effect on As5+ binding.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Environmental Sciences
Xiaoming Zhao, Zidan Yuan, Shaofeng Wang, Guoqing Zhang, Shan Qu, Yidi Wang, Sijia Liu, Yuanming Pan, Jinru Lin, Yongfeng Jia
Summary: The ubiquitous co-existence of arsenic and cadmium presents a major challenge to the environment. This study found that the co-existence of arsenic and cadmium significantly delays the transformation rates of ferrihydrite, and alters the composition of transformation products. Additionally, the co-existent arsenic modifies the distribution of cadmium, reducing its mobility.
Article
Geochemistry & Geophysics
Shiwen Hu, Tongxu Liu, Lirong Zheng, Pei Wang, Yang Yang, Fangbai Li, Zhenqing Shi, Chongxuan Liu, Hui Li
Summary: The immobilization of As(V) during chemodenitrification is influenced by pH, Fe mineral transformation, and the binding mechanism of As(V). High pH and low As(V) favor the formation of secondary crystalline Fe oxides, while the amount of As(V) sequestration is positively correlated with newly-formed crystalline Fe minerals.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Engineering, Environmental
Jiezi Jin, Yu Liang, Mingxia Wang, Linchuan Fang, Juan Xiong, Jingtao Hou, Wenfeng Tan, Luuk Koopal
Summary: Researchers have developed a generic protonation parameters model to describe the surface reactivity of iron (hydr)oxides in soils and sediments. The model has been tested and validated with various iron (hydr)oxides and provides good predictions of their proton reactivity in electrolyte solutions. This generic model simplifies the study of iron (hydr)oxides and does not require spectroscopic measurements or proton titrations.
Article
Agricultural Engineering
Nirav P. Raval, Manish Kumar
Summary: This study focuses on developing a novel biosorbent for removing arsenate from water resources. The biosorbent showed high adsorption capacity and can effectively remove different types of contaminants. This research is significant for addressing water pollution issues.
BIORESOURCE TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Chao Xue, Xiaoyun Yi, Yuebei Yang, Feng Jiang, Hua Yin, Zhi Dang
Summary: It has been believed that the adsorption mechanism of cadmium on iron (oxyhydr)oxide is solely the inner-sphere complexation. However, this study found that under different pH and ionic strength conditions, the bonding pathway of cadmium could be different, including electrostatic adsorption and surface-induced precipitates. Additionally, the presence of sulfate may also influence the sorption pathway of cadmium by forming pseudo ion-group species with cadmium.
ENVIRONMENTAL SCIENCE-NANO
(2023)
Article
Environmental Sciences
Junheng He, Chen Yang, Yurong Deng, Zhuozhi Ouyang, Ziqing Huang, Jingjing Yang, Jini Zhou, Chunfeng He, Zhi Dang
Summary: The study demonstrated that ferrihydrite has a strong adsorption capacity for tetracycline and the adsorption mechanisms involve electrostatic interaction, H-bonding, and complexation. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy results revealed the main functional groups of tetracycline responsible for complexation with ferrihydrite. Moreover, tetracycline adsorbed on ferrihydrite can be degraded through a pseudo-second-order kinetics model involving electron transfer and the formation of Fe(II) ions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Sunday J. Olusegun, Taiane. G. F. Souza, Nelcy. D. S. Mohallem, Virginia. S. T. Ciminelli
Summary: Pure ferrihydrite and ferrihydrite-biosilica composite were synthesized and studied for the removal of As(III) and As(V). The synthesized materials showed high adsorption capacity for As(III) and As(V), with pH significantly affecting As(V) adsorption. Thermal treatment promoted ferric arsenate formation and oxidized As(III) to As(V), resulting in changes in As mobility in the adsorption residues. This work presents a process for environmentally safe disposal of As residues after As removal and thermal treatment of arsenic-loaded ferrihydrites.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Energy & Fuels
Lawrence Opoku Boampong, Roozbeh Rafati, Amin Sharifi Haddad
Summary: This study developed a new wettability alteration model to predict the performance of low salinity waterflooding (LSWF) oil recovery processes. The results from simulations with the new model were consistent with experimental data, showing that the improved oil recovery observed in LSWF is not solely due to wettability alteration, but also other factors. These findings improve the understanding of the LSWF process and have implications for the design and planning of LSWF projects.
Article
Geochemistry & Geophysics
Yang Yang, Xiu Yuan, Wenting Chi, Pei Wang, Shiwen Hu, Fangbai Li, Xiaomin Li, Tongxu Liu, Yan Sun, Haoli Qin
Summary: This study investigated the transformation of Cd speciation in paddy soil under anaerobic and aerobic conditions, revealing important mechanisms such as increased adsorption on organic matter and reductive dissolution of Fe oxides. The kinetic models established for soil biogeochemical processes provided a feasible approach to predict Cd phytoavailability during the drainage phase of acid paddy field, with a stronger correlation to Cd content in rice grain than chemical extraction methods.
Article
Engineering, Environmental
Xinyue Shen, Huiyan Zhu, Pei Wang, Lirong Zheng, Shiwen Hu, Chongxuan Liu
Summary: This study established a model for quantifying Cd species during phase transformation based on batch experiments and mechanistic insights, revealing the effects of Fe(II) concentrations on the formation of secondary Fe minerals and the distribution of Cd and FA. The results contribute to an in-depth understanding of the mobility of Cd in the environment and provide a method for quantifying the dynamic behavior of heavy metals in multi-reactant systems.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Geochemistry & Geophysics
Juan Antelo, Sarah Fiol, Ivan Carabante, Arantxa Arroyo, Juan S. Lezama-Pacheco, Natasha Josevska, Chloe Protopapa, Jurate Kumpiene
Summary: This study found that the presence of arsenic can delay the transformation of schwertmannite into more stable crystalline goethite, especially under higher arsenic loadings and more acidic conditions. Additionally, under anoxic conditions, both Fe(II) and ascorbic acid can promote the mineral transformation or reductive dissolution of schwertmannite, with arsenic reducing the catalytic effect of Fe(II) and stabilizing the schwertmannite particles.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2021)
Article
Environmental Sciences
Hermano M. Queiroz, Tiago O. Ferreira, Diego Barcellos, Gabriel N. Nobrega, Juan Antelo, Xose L. Otero, Angelo F. Bernardino
Summary: The study found that the deposition of Fe-rich tailings in the Rio Doce Estuary in Brazil significantly influenced the enrichment of phosphorus in estuarine soils. Over time, there was a significant decrease in the crystallinity of Fe oxyhydroxides in estuarine soils, while the content of low crystallinity Fe oxyhydroxides increased. These changes were associated with dissimilatory Fe reduction, leading to a significant increase in the concentration of readily available phosphorus.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Diego Aran, Erika S. Santos, Maria Manuela Abreu, Juan Antelo, Felipe Macias
Summary: The study evaluated the effectiveness of a designed Technosol in rehabilitating uranium mine tailings, showing that the rehabilitated tailings improved physicochemical properties, reduced concentrations of hazardous elements, facilitated plant cover, and decreased ecotoxicological risks and spread of hazardous elements.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2022)
Article
Environmental Sciences
R. Lopez, J. Antelo, A. C. Silva, F. Bento, S. Fiol
Summary: This study analyzed compost samples from different sources and treated with different composting methods to investigate their chemical composition, physicochemical, and acid-base properties, revealing correlations and testing the potential value of compost as amendments. The application of compost improved soil pH, organic matter and nutrient content, and promoted seed germination and root growth in a mining area.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Geochemistry & Geophysics
Mismel Ruiz-Garcia, Mario Villalobos, Juan Antelo, Nadia Martinez-Villegas
Summary: This study investigated the sorption behavior of thallium on clay and humic acids and revealed the mechanisms of cation sorption through modeling and experimental results. The study found that the sorption behavior of thallium differed at different pH values, providing further understanding of geochemical mechanisms in contaminated soils.
APPLIED GEOCHEMISTRY
(2022)
Article
Environmental Sciences
Mitra Amini, Juan Antelo, Sarah Fiol, Rasoul Rahnemaie
Summary: This study evaluated the variations in extractable-P in soils under different redox conditions. The results showed that the solid to solution ratio and bicarbonate concentration significantly affected the extraction of phosphate, with more phosphate extracted under anoxic conditions. The effect of bicarbonate concentration was more pronounced in soil samples with higher organic carbon content. The CD-MUSIC model successfully predicted the effect of solid to solution ratio on extractable-P under both oxic and anoxic conditions.
Article
Chemistry, Multidisciplinary
Jon Petter Gustafsson, Juan Antelo
Summary: The solubility and bioavailability of arsenic in the environment are largely affected by its adsorption reactions with iron oxides. The adsorption of arsenate and phosphate on ferrihydrite suspensions was studied in batch experiments. A surface complexation model based on the CD-MUSIC concept was developed to describe the interactions. The experimental results showed that arsenate and phosphate displayed similar adsorption patterns in single-ion systems, but arsenate was preferentially adsorbed over phosphate in competitive systems. The developed model successfully described these adsorption patterns and predicted the presence of complexation compounds during adsorption.
ACS EARTH AND SPACE CHEMISTRY
(2022)
Article
Green & Sustainable Science & Technology
Ana Catarina Silva, Ana Teixeira, Juan Antelo, Patricia Valderrama, Rui Oliveira, Ana Cunha, Renaud Gley, Jose Paulo Pinheiro, Sarah Fiol, Fatima Bento
Summary: This study compares the characteristics of seven composts produced from different raw materials and composting methodologies, and explores their potential in agriculture. Although the organic matter stabilization in these composts is suitable for agricultural applications, they exhibit distinct elemental and structural compositions. Additionally, different fertilizers have varying effects on lettuce growth. Some common features were identified, such as mass loss, associations between groups of elements, and correlations between carbon nanostructures and aromaticity parameters.
Article
Geochemistry & Geophysics
Carlos Lazaro, Juan Antelo, Ivan Carabante, Alba Otero-Farina, Pedro V. Verdes, Bruno Dacunha-Marinho, Sarah Fiol
Summary: This study examined the thermal transformation from schwertmannite to hematite and its effect on metal(oid) partitioning. It was found that the transformation occurred at temperatures above 400 degrees C, and the presence of chromium had little impact on the transformation temperature. As the temperature increased, the mobility of chromium decreased, and it was less outcompeted by arsenic adsorption. At temperatures above 600 degrees C, non-mobile forms strongly associated with neo-formed hematite were found. The neo-formation of hematite led to a decrease in arsenic adsorption, potentially enhancing arsenic mobility in AMD systems.
Article
Biochemistry & Molecular Biology
Ana C. C. Silva, Pedro Rocha, Dulce Geraldo, Ana Cunha, Juan Antelo, Jose P. Pinheiro, Sarah Fiol, Fatima Bento
Summary: This study demonstrates the use of Cd2+ as a reactivity probe for compost extracts of fulvic acids, humic acids, and dissolved organic matter. The HA extract showed the highest reactivity among the extracts. Furthermore, the reactivity variation was the largest for HA, followed by FA and DOM extracts. A parameter, equivalent mass of fertiliser (m(EF)), was used to calculate the compost quality and compared with uncomposted organic fertiliser. The significance of this parameter was verified through a correlation analysis between binding extent and the effect of compost application on lettuce crop growth.
Article
Geochemistry & Geophysics
Zhen-Min Ge, Xiao-Long Huang, Wei Xie, Tobias W. Hofig, Fan Yang, Yang Yu, S. Khogenkumar Singh
Summary: The mantle source composition of the nascent oceanic crust in the central part of the Gulf of California has been investigated using basaltic glass samples. These samples show trace element patterns similar to enriched mid-ocean ridge basalts, suggesting that the nascent oceanic crust in the Guaymas Basin might be generated through partial melting of a depleted mantle source metasomatized by subducted slab materials.
Article
Geochemistry & Geophysics
Jean-Michel Brazier, Katja E. Goetschl, Martin Dietzel, Vasileios Mavromatis
Summary: This study estimated the distribution coefficient of Zn2+ between calcite/aragonite and reactive fluids and found that the growth rate strongly influences D-Zn(2+) in both minerals. Additionally, a linear correlation was found between D-Zn(2+) and the saturation degree of the reactive fluid.
Article
Geochemistry & Geophysics
Ming Lei, Michele Lustrino, Jifeng Xu, Zhiqiang Kang, Zhengfu Guo, Jianlin Chen
Summary: This study presents a comprehensive geochronological, mineralogical, and geochemical analysis of olivine leucitites in the Maiga area of southern Tibet, suggesting that these rocks originate from a carbonated peridotite mantle source and highlighting the possibility of carbonates being recycled deep into the mantle during continental subduction.
Article
Geochemistry & Geophysics
Yuntao Ye, Xiaomei Wang, Huajian Wang, Haifeng Fan, Zhigang Chen, Qingjun Guo, Ziteng Wang, Chaodong Wu, Donald E. Canfield, Shuichang Zhang
Summary: Phosphorus is an essential element for life and its cycle in the ocean is closely connected with the carbon and oxygen cycles. The study of phosphate oxygen isotopes can provide insights into various reactions related to phosphorus. By analyzing carbonate fluorapatite samples from the Mesoproterozoic Era in North China, it was found that the oxygen isotope values were lower compared to modern samples, indicating a warmer climate during that time period and a potential reason for the scarcity of phosphorite.
Article
Geochemistry & Geophysics
Vincent Busigny, Oanez Lebeau, Didier Jezeduel, Carine Chaduteau, Sean Crowe, Magali Ader
Summary: This study conducted high-precision Mo isotope research on hydrothermal metal sulfides from a porphyry copper deposit in Southwest China and found that different stages of mineralization have distinct Mo isotope compositions, providing valuable insights into the behavior of Mo isotopes in magmatic-hydrothermal systems.
Article
Geochemistry & Geophysics
Min Ji, Xiao-Ying Gao, Yong-Fei Zheng, Bing Gong
Summary: The study examines the anatectic mechanisms in the Himalayan orogen, finding that pressure and temperature control the reaction, while water content mainly affects the solid-phase composition. Dehydration and hydration melting likely occur at different depths in the crust. This research provides important insights into the melting processes in collisional orogens.
